Free Percentage Calculator
Calculate percentages three different ways. No account needed.
What is
% of
?
is what % of
?
% change from
to
?
Frequently Asked Questions
How do I calculate a percentage of a number? +
To find X% of Y, multiply Y by X and divide by 100. For example, 20% of 150 = (150 x 20) / 100 = 30.
How do I find what percent one number is of another? +
Divide the part by the whole and multiply by 100. For example, 30 is what percent of 150? (30 / 150) x 100 = 20%.
How is percentage change calculated? +
Percentage change = ((New Value - Old Value) / Old Value) x 100. A positive result means an increase, negative means a decrease.
What's the difference between percentage and percent change? +
A percentage is a portion of a whole (e.g., 25% of 200 is 50). Percent change measures how much a value has increased or decreased relative to its original amount.
Is this calculator free? +
Yes. Completely free, no signup, no limits. All calculations are done in your browser.